diff options
| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2015-12-01 09:06:54 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2015-12-14 15:19:14 +1100 |
| commit | 6a119eae942c51ccf1091936c534bac12cae630e (patch) | |
| tree | f1124f47f1e7b9d94777623e3914f74ea4aad8a3 /arch/powerpc/include/asm/pte-common.h | |
| parent | e34aa03ca48d0c7982530436ce996f374b65913c (diff) | |
powerpc/mm: Add a _PAGE_PTE bit
For a pte entry we will have _PAGE_PTE set. Our pte page
address have a minimum alignment requirement of HUGEPD_SHIFT_MASK + 1.
We use the lower 7 bits to indicate hugepd. ie.
For pmd and pgd we can find:
1) _PAGE_PTE set pte -> indicate PTE
2) bits [2..6] non zero -> indicate hugepd.
They also encode the size. We skip bit 1 (_PAGE_PRESENT).
3) othewise pointer to next table.
Acked-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/pte-common.h')
| -rw-r--r-- | arch/powerpc/include/asm/pte-common.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/pte-common.h b/arch/powerpc/include/asm/pte-common.h index 71537a319fc8..1ec67b043065 100644 --- a/arch/powerpc/include/asm/pte-common.h +++ b/arch/powerpc/include/asm/pte-common.h @@ -40,6 +40,11 @@ #else #define _PAGE_RW 0 #endif + +#ifndef _PAGE_PTE +#define _PAGE_PTE 0 +#endif + #ifndef _PMD_PRESENT_MASK #define _PMD_PRESENT_MASK _PMD_PRESENT #endif |